Publication Information
Title:
| Gouty pitch midge damage to ponderosa pines planted on fertile
and infertile soils in the western Sierra Nevada |
Author(s): |
Ferrell, George T.; Bedard, William D.; Jenkinson, James L. |
Date: |
1987 |
Source: |
Res. Note PSW-RN-390. Berkeley, CA: U.S. Department
of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 3 p |
Station ID: |
RN-PSW-390 |
Description: |
Crown damage caused by gouty pitch midge (GPM) and its effects on tree growth were assessed in two 14-year-old ponderosa pine plantations, one on a shallow, infertile soil derived from serpentine and the other on a deeper, more fertile nonserpentine soil of marine parent material. Seed sources for each plantation were nearby indigenous stands on the same soils. Trees in both plantations had either viscid (resinous) or nonviscid surfaces on spring shoots. Light to moderate GPM damage was found in both plantations. Trees of both seed sources grew much faster in the nonserpentine than in the serpentine plantation. And in the serpentine plantation, the serpentine seed source grew faster than the nonserpentine
seed source. But both fast- and slowgrowing trees had similar levels of GPM
damage. Both direct and inverse relationships between GPM damage and growth of trees within seed sources occurred in both plantations, thus there was little evidence that GPM damage had affected tree growth on either site. In all comparisons, trees with viscid shoot surfaces had more GPM damage than trees with nonviscid shoots, a difference not previously
reported for plantations with locally adapted seed sources. |
![](/images/pdficonarrow.gif) |
View and Print this Publication (322 KB) |
Publication Notes: |
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
- You may send email to pubrequest@fs.f
ed.us to request a hard copy of this publication. (Please specify exactly
which publication you are requesting and your mailing address.)
|
![[ Get Acrobat ]](/images/getacro.gif) |
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility |